Adding "- Vivaldi" to tab titles

I am running some window management software (via AutoHotkey) and I cannot "match" the Vivaldi browser window because I have no text pattern to mach on since the term "Vivaldi" is not part of the UI, just the HTML page title. So I need to include something like "- Vivaldi" to all tab titles (since I guess I cannot just make it work like Firefox does where this is a hidden part of the tab title (but available hovering over the task bar) - is this possible?